In brief:
Go to ER

You have sudden chest pain at the age of 30 years and you are short of breath.

You need to go to er and let the doctors decide what tests if any you need and stop making your own diagnosis.We don't know details of your history and i can tell you that without any risk factors it is very unlikely that you have pulmonary embolism
if doctors in er feel you need a ct scan they will do it, only if indicat.

In brief:
Go to ER

You have sudden chest pain at the age of 30 years and you are short of breath.

You need to go to er and let the doctors decide what tests if any you need and stop making your own diagnosis.We don't know details of your history and i can tell you that without any risk factors it is very unlikely that you have pulmonary embolism
if doctors in er feel you need a ct scan they will do it, only if indicat.
Would you like to video or text chat with me?